Surface pressures on a flat plate with dual jet configurations

“…Results demonstrate high speed transverse jet penetration scales with jet-to-freestream stagnation pressure ratio. Schetz et al [4] conducted an experimental investigation on single and dual jets with velocity ratios from 3 to 8, spacing from 2 to 6 diameters, and injection angles of 90, 75, and 105 deg.…”

Section: Introductionmentioning

confidence: 99%

Flow Visualization on Lateral Multiple Jet Interaction with Freestream

Chen¹,

Li²,

Luo³

et al. 2014

JFCMV

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The interaction flowfield of gaseous jets ejecting from three different orifice configurations into a Mach 5 turbulent crossflow over a flat plate was investigated experimentally. These jet configurations have equal equivalent throat diameter of 6 mm and nominal exit Mach number of 3. Schlieren photography was used to visualize the spatial flow structures; meanwhile surface oil flow patterns were employed to identify the separation and reattachment regions on the flat plate. Results show the influence of the jet-to-freestream static pressure ratio and jet configurations on flow interaction characteristics.

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“…5 Different interpretations of the measurements have been presented due to the difficulties in measuring complex flows using hot-film and pitot-probe techniques, e.g., Jenkins and Hill 6 and Kotansky and Glaze. 7 Kavasaoglu et al 8 and Schetz et al 9 also present flowfield and pressure data for twin-rectangular jets for small jet-to-crossflow velocity ratios (V y /t/ 0 = 2.2, 4, and 8). Saripalli 3 reports laser Doppler velocity (LDV) measurements, including those of shear stress, for axisymmetric impinging jets with S/D = 9 and 14 and HID = 3 and 5.5, but again the existence of a crossflow was not considered.…”

Section: Introductionmentioning

confidence: 99%

Fountain Flows Produced by Multijet Impingement on a Ground Plane

Barata¹

1993

Journal of Aircraft

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A numerical and experimental study is made of the characteristics of three-dimensional fountain flows generated by the impingement of two-or three-axisymmetric turbulent jets on a ground plane through the influence of a low-velocity crossflow. This study provides a basis to understanding more complex flowfields in numerous practical situations including jet-powered vertical/short takeoff and landing (V/STOL) aircraft. The simulations are based on the solution of the time-averaged Navier-Stokes equations and the k-e turbulence model. The computed results are compared with laser-Doppler measurements and visualization results for the cases of two and three jets impinging on a flat plate located at five jet diameters from the jet exit, and a velocity ratio between the jet and crossflow of 30. Comparisons between experimental and numerical results show generally good agreement for the mean flowfield quantities.

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Surface pressures on a flat plate with dual jet configurations

Cited by 21 publications

References 3 publications

Experimental Study of Two Impinging Jets Aligned With a Crossflow

Experimental Study of Two Impinging Jets Aligned With a Crossflow

Flow Visualization on Lateral Multiple Jet Interaction with Freestream

Fountain Flows Produced by Multijet Impingement on a Ground Plane

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